| WOTSO Ltd | New South Wales |
| WP Creative | |
| WP Melbourne | Victoria |
| Wrappt | Queensland |
| Wuit Pty Ltd | |
| WWWalker Web Development Pty Ltd | New South Wales |
| Wyntec Pty Ltd | Queensland |
| X Spaces Pty Ltd | New South Wales |
| X-Team | Victoria |
| X10sive Media | |
| X4000 Communications Pty Ltd | |
| XAM Consulting | New South Wales |
| Xari Group | Queensland |
| XBC Business Technology | Queensland |
| Xceed Pty Ltd | Victoria |
| XCOM | Queensland |
| XEN Systems | New South Wales |
| Xenabler | New South Wales |
| Xenex Media | Queensland |
| Xenon Systems Pty Ltd | Victoria |
| Xerta | New South Wales |
| Xfive.co Pty Ltd | Victoria |
| Xflow | |
| XGameDev Pty Ltd | |
| xGrowth Pty Ltd | Victoria |
| XII Pty Ltd | Victoria |
| Xnet IT | New South Wales |
| Xodigital | |
| Xoom Digital | New South Wales |
| Xpanda Media Pty Ltd | New South Wales |
| Xparx Computing | Western Australia |
| Xplor Education | Victoria |
| XR:WA | Western Australia |
| Xref | |
| Xtreme Soft Solutions | |
| Xtreme.com.au Pty Ltd | Queensland |
| Xugar | Victoria |
| XWP.co Pty Ltd | Victoria |
| XY Sense | |
| Yabb | New South Wales |
| Yahoo Australia | New South Wales |
| Yanir Seroussi | |
| Yarra Web | Victoria |
| YART | |
| Yazoogle | |
| YBF Ventures | Victoria |
| Yellowfin International Pty Ltd | Victoria |
| Yes Digital | Queensland |
| Yes I Can Digital | Victoria |
| Yesco Adaptable Database | Western Australia |